Despite looking a little out of shape, the “Hold It Against Me” star put on an awesome performance and with weeks of shows to come, she’ll be back to her svelte self in no time.

Brit tweeted a picture of herself with her boyfriend Jason Trawick backstage moments before she stepped onstage. ‘It’s opening night B**** Britney,’ she wrote before later adding: ‘Sacramento was on fire tonight. Can’t sleep. WAY too much adrenaline right now.’